Philips CD104 tweaks

[henri_85]

Hi Andy,

One "last" (I can't promise ) thing: in the PSU, C2452 was a 1500µF35V cap. The tension indicated on the shematics is 18.6 V. I wish to order some new caps, but the closest they have is 2200µF 25V. Theoretically the input voltage should be ok, but do you think the 25V characteristics will be strong enough for that purpose?

Henri

[poynton]

Hi.

25v caps should be OK.

Andy

[henri_85]

Thank you Andy. I'll order and install them in it next weekend.

Henri

[pfshepherd]

hey munchingmalc - did you see my post about the Linx Nebula Schematic? I've been trying to contact you but this forum won't let me because I'm a new member...or something...
Anyway, let me know if you think I can help.
Cheers.

[Onnosr]

I modified my 3rd CD104 with NOS and 2 TDA1541A's

This time the decoupler caps etc are on the upper side of the
PCB. see attached photo.
(MSB=1mf)

On the saa7000 every decoupler cap (0,022mf) is parallelled with a 0,1 mf mkt cap

The data and clock lines go directly from the SAA7000
to the TDA1541A's with thick copper wires ( Including the groudline, I cut the lines on the PCB.)

In a former post I mentioned that I have replaced the output caps
with tantaliums. That was a big mistake !!
Now there are two 3.3 mf (MKT) parallel, and that differs a lot !!
(6.8 mf MKT were not available)

Again I compared this mod with a NOS mod and 2 tda 1540P.
And the difference is clear. The 2 TDA1541A sound nicer !

Is there actually somebody who has done this mod too ???

Regards to all

Onno

[robo]

onnosr

i want to use TDA1540D(i love its sound) with SAA7210.is that possible?
and how to do it?

thanks...
robo

[Onnosr]

Originally posted by robo
onnosr

i want to use TDA1540D(i love its sound) with SAA7210.is that possible?
and how to do it?

thanks...
robo

The SAA7210 is 16 bit and outputs only I2S. (serial data)

The TDA1540d is 14 bit and takes only parallel data. (L or R)

So IMHO it is not possible.

PS I emailed the datasheet of the SAA7210 to you.

Regards,

Onno

[robo]

pity....
thank you all the same.
i love TDA1540D more than TDA154AS1.maybe i have to use SAA7000/7010/7020/7030 to drvie it....

robo..

[rfbrw]

Originally posted by robo
onnosr

i want to use TDA1540D(i love its sound) with SAA7210.is that possible?
and how to do it?

thanks...
robo

It is possible so long as you understand you will loose two bits. A good place to start would Analog Devices application note AN-207.
This shows how to connect the SAA7220 to a pair of mono dacs. The circuit will then have to be modified to suit the SAA7210.

[robo]

thanks for your reply.
i just want to use TDA1540D as easy as possible,and also as well as possible.
of course i can use it in those CDP just like CD104 or CD25 of marantz.but i want to disign a new PCB for CDM3 laser,which uses TDA5708/TDA5709 as its SER,it has been done.and also uses SAA7210/MAB8441,it is in my plan,easy things.
the only problem is:how to use TDA1540D in my new disign?i think the main thing is how to cnonnet SAA7030 to SAA7210.

anybody can help?please

robo